/* * inception.c - Inception 8-player joystick adapter emulation. * * Written by * Marco van den Heuvel * * This file is part of VICE, the Versatile Commodore Emulator. * See README for copyright notice. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA * 02111-1307 USA. * */ #include "vice.h" #include #include #include #include "joyport.h" #include "joystick.h" #include "inception.h" #include "resources.h" #include "snapshot.h" #include "snespad.h" #include "log.h" /* Control port <--> INCEPTION connections: cport | INCEPTION ------------------- 1 | D0 2 | D1 3 | D2 4 | D3 6 | D4 Note that +5VDC is provided for the 8 joystick ports. Works on: - native joystick port(s) (x64/x64sc/xscpu64/x128/xvic/xcbm5x0) */ static int inception_enabled = 0; static uint8_t counter = INCEPTION_STATE_IDLE; static uint8_t clock_line = 1; /* ------------------------------------------------------------------------- */ static joyport_t joyport_inception_device; static int joyport_inception_set_enabled(int port, int enabled) { int new_state = enabled ? 1 : 0; if (new_state == inception_enabled) { return 0; } if (new_state) { /* enabled, activate joystick adapter, clear counter and set extra joy ports to 8 */ joystick_adapter_activate(JOYSTICK_ADAPTER_ID_INCEPTION, joyport_inception_device.name); counter = 0; /* Enable 8 extra joystick ports, with +5VDC support */ joystick_adapter_set_ports(8, 1); } else { /* disabled, deactivate joystick adapter */ joystick_adapter_deactivate(); } /* set the current state */ inception_enabled = new_state; return 0; } static uint8_t inception_read(int port) { uint8_t retval; uint8_t joyval1 = ~read_joyport_dig(JOYPORT_3); uint8_t joyval2 = ~read_joyport_dig(JOYPORT_4); uint8_t joyval3 = ~read_joyport_dig(JOYPORT_5); uint8_t joyval4 = ~read_joyport_dig(JOYPORT_6); uint8_t joyval5 = ~read_joyport_dig(JOYPORT_7); uint8_t joyval6 = ~read_joyport_dig(JOYPORT_8); uint8_t joyval7 = ~read_joyport_dig(JOYPORT_9); uint8_t joyval8 = ~read_joyport_dig(JOYPORT_10); switch (counter) { case INCEPTION_STATE_IDLE: retval = 0xff; break; case INCEPTION_STATE_HI_JOY1: /* return joystick 1 high nibble */ retval = (uint8_t)JOYPORT_BIT_SHIFT(joyval1, JOYPORT_FIRE_2_BIT, JOYPORT_RIGHT_BIT); /* output joystick 1 fire 2 button on joyport 'right' pin */ retval = (uint8_t)JOYPORT_BIT_SHIFT(joyval1, JOYPORT_FIRE_1_BIT, JOYPORT_UP_BIT); /* output joystick 1 fire 1 button on joyport 'up' pin */ break; case INCEPTION_STATE_LO_JOY1: /* return joystick 1 low nibble */ retval = joyval1 & 0xf; /* output joystick 1 directions on joyport direction pins */ break; case INCEPTION_STATE_HI_JOY2: /* return joystick 2 high nibble */ retval = (uint8_t)JOYPORT_BIT_SHIFT(joyval2, JOYPORT_FIRE_2_BIT, JOYPORT_RIGHT_BIT); /* output joystick 2 fire 2 button on joyport 'right' pin */ retval = (uint8_t)JOYPORT_BIT_SHIFT(joyval2, JOYPORT_FIRE_1_BIT, JOYPORT_UP_BIT); /* output joystick 2 fire 1 button on joyport 'up' pin */ break; case INCEPTION_STATE_LO_JOY2: /* return joystick 2 low nibble */ retval = joyval2 & 0xf; /* output joystick 2 directions on joyport direction pins */ break; case INCEPTION_STATE_HI_JOY3: /* return joystick 3 high nibble */ retval = (uint8_t)JOYPORT_BIT_SHIFT(joyval3, JOYPORT_FIRE_2_BIT, JOYPORT_RIGHT_BIT); /* output joystick 3 fire 2 button on joyport 'right' pin */ retval = (uint8_t)JOYPORT_BIT_SHIFT(joyval3, JOYPORT_FIRE_1_BIT, JOYPORT_UP_BIT); /* output joystick 3 fire 1 button on joyport 'up' pin */ break; case INCEPTION_STATE_LO_JOY3: /* return joystick 3 low nibble */ retval = joyval3 & 0xf; /* output joystick 3 directions on joyport direction pins */ break; case INCEPTION_STATE_HI_JOY4: /* return joystick 4 high nibble */ retval = (uint8_t)JOYPORT_BIT_SHIFT(joyval4, JOYPORT_FIRE_2_BIT, JOYPORT_RIGHT_BIT); /* output joystick 4 fire 2 button on joyport 'right' pin */ retval = (uint8_t)JOYPORT_BIT_SHIFT(joyval4, JOYPORT_FIRE_1_BIT, JOYPORT_UP_BIT); /* output joystick 4 fire 1 button on joyport 'up' pin */ break; case INCEPTION_STATE_LO_JOY4: /* return joystick 4 low nibble */ retval = joyval4 & 0xf; /* output joystick 4 directions on joyport direction pins */ break; case INCEPTION_STATE_HI_JOY5: /* return joystick 5 high nibble */ retval = (uint8_t)JOYPORT_BIT_SHIFT(joyval5, JOYPORT_FIRE_2_BIT, JOYPORT_RIGHT_BIT); /* output joystick 5 fire 2 button on joyport 'right' pin */ retval = (uint8_t)JOYPORT_BIT_SHIFT(joyval5, JOYPORT_FIRE_1_BIT, JOYPORT_UP_BIT); /* output joystick 5 fire 1 button on joyport 'up' pin */ break; case INCEPTION_STATE_LO_JOY5: /* return joystick 5 low nibble */ retval = joyval5 & 0xf; /* output joystick 5 directions on joyport direction pins */ break; case INCEPTION_STATE_HI_JOY6: /* return joystick 6 high nibble */ retval = (uint8_t)JOYPORT_BIT_SHIFT(joyval6, JOYPORT_FIRE_2_BIT, JOYPORT_RIGHT_BIT); /* output joystick 6 fire 2 button on joyport 'right' pin */ retval = (uint8_t)JOYPORT_BIT_SHIFT(joyval6, JOYPORT_FIRE_1_BIT, JOYPORT_UP_BIT); /* output joystick 6 fire 1 button on joyport 'up' pin */ break; case INCEPTION_STATE_LO_JOY6: /* return joystick 6 low nibble */ retval = joyval6 & 0xf; /* output joystick 6 directions on joyport direction pins */ break; case INCEPTION_STATE_HI_JOY7: /* return joystick 7 high nibble */ retval = (uint8_t)JOYPORT_BIT_SHIFT(joyval7, JOYPORT_FIRE_2_BIT, JOYPORT_RIGHT_BIT); /* output joystick 7 fire 2 button on joyport 'right' pin */ retval = (uint8_t)JOYPORT_BIT_SHIFT(joyval7, JOYPORT_FIRE_1_BIT, JOYPORT_UP_BIT); /* output joystick 7 fire 1 button on joyport 'up' pin */ break; case INCEPTION_STATE_LO_JOY7: /* return joystick 7 low nibble */ retval = joyval7 & 0xf; /* output joystick 7 directions on joyport direction pins */ break; case INCEPTION_STATE_HI_JOY8: /* return joystick 8 high nibble */ retval = (uint8_t)JOYPORT_BIT_SHIFT(joyval8, JOYPORT_FIRE_2_BIT, JOYPORT_RIGHT_BIT); /* output joystick 8 fire 2 button on joyport 'right' pin */ retval = (uint8_t)JOYPORT_BIT_SHIFT(joyval8, JOYPORT_FIRE_1_BIT, JOYPORT_UP_BIT); /* output joystick 8 fire 1 button on joyport 'up' pin */ break; case INCEPTION_STATE_LO_JOY8: /* return joystick 8 low nibble */ retval = joyval8 & 0xf; /* output joystick 8 directions on joyport direction pins */ break; default: retval = 0xff; } return retval; } static void inception_store(int port, uint8_t val) { uint8_t new_clock = (val & 0x10) >> 4; uint8_t lines = val & 0x1f; if (!lines) { /* all lines are low, put inception into idle state */ counter = INCEPTION_STATE_IDLE; } else { if (clock_line != new_clock) { /* increment the state counter if the end of sequence has not been reached */ if (counter < INCEPTION_STATE_EOS) { counter++; } else { /* end of sequence has been reached, put inception into idle state */ counter = INCEPTION_STATE_IDLE; } } } clock_line = new_clock; } static void inception_powerup(int port) { counter = 0; } /* ------------------------------------------------------------------------- */ static int inception_write_snapshot(struct snapshot_s *s, int port); static int inception_read_snapshot(struct snapshot_s *s, int port); static joyport_t joyport_inception_device = { "Joystick Adapter (Inception)", /* name of the device */ JOYPORT_RES_ID_NONE, /* device can be used in multiple ports at the same time */ JOYPORT_IS_NOT_LIGHTPEN, /* device is NOT a lightpen */ JOYPORT_POT_OPTIONAL, /* device does NOT use the potentiometer lines */ JOYPORT_5VDC_REQUIRED, /* device NEEDS +5VDC to work */ JOYSTICK_ADAPTER_ID_INCEPTION, /* device is a joystick adapter */ JOYPORT_DEVICE_JOYSTICK_ADAPTER, /* device is a Joystick adapter */ 0x1F, /* bits 4, 3, 2, 1 and 0 are output bits */ joyport_inception_set_enabled, /* device enable/disable function */ inception_read, /* digital line read function */ inception_store, /* digital line store function */ NULL, /* NO pot-x read function */ NULL, /* NO pot-y read function */ inception_powerup, /* powerup function */ inception_write_snapshot, /* device write snapshot function */ inception_read_snapshot, /* device read snapshot function */ NULL, /* NO device hook function */ 0 /* NO device hook function mask */ }; /* ------------------------------------------------------------------------- */ int joyport_inception_resources_init(void) { return joyport_device_register(JOYPORT_ID_INCEPTION, &joyport_inception_device); } /* ------------------------------------------------------------------------- */ /* INCEPTION snapshot module format: type | name | description ---------------------------------- BYTE | COUNTER | counter value BYTE | CLOCK | clock line state */ static const char snap_module_name[] = "INCEPTION"; #define SNAP_MAJOR 0 #define SNAP_MINOR 0 static int inception_write_snapshot(struct snapshot_s *s, int p) { snapshot_module_t *m; m = snapshot_module_create(s, snap_module_name, SNAP_MAJOR, SNAP_MINOR); if (m == NULL) { return -1; } if (0 || SMW_B(m, counter) < 0 || SMW_B(m, clock_line) < 0) { snapshot_module_close(m); return -1; } return snapshot_module_close(m); } static int inception_read_snapshot(struct snapshot_s *s, int p) { uint8_t major_version, minor_version; snapshot_module_t *m; m = snapshot_module_open(s, snap_module_name, &major_version, &minor_version); if (m == NULL) { return -1; } /* Do not accept versions higher than current */ if (snapshot_version_is_bigger(major_version, minor_version, SNAP_MAJOR, SNAP_MINOR)) { snapshot_set_error(SNAPSHOT_MODULE_HIGHER_VERSION); goto fail; } if (0 || SMR_B(m, &counter) < 0 || SMR_B(m, &clock_line) < 0) { goto fail; } return snapshot_module_close(m); fail: snapshot_module_close(m); return -1; }